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When ones hand is extremely flappy and/or numbed, which is to be used to pleasure ones self. Or also known as masturbating with a flappy hand.
Guy who's about to flappy fap: "Right, time to get the tissues and fap myself with my numb hand. I'm really feeling the tingles tonight."
by A Guy with a problem. March 01, 2014

Words related to flappy fap

fap flap hand masturbate self